refactor(indexeddb): remove unnecessary fn IndexedEventRelationKey::with_related_event_id

Signed-off-by: Michael Goldenberg <[email protected]>

Author: mgoldenberg

crates/matrix-sdk-indexeddb/src/event_cache_store/serializer/types.rs

@@ -528,23 +528,6 @@ pub type IndexedEventPositionIndex = usize;
 #[derive(Debug, Serialize, Deserialize)]
 pub struct IndexedEventRelationKey(IndexedRoomId, IndexedEventId, IndexedRelationType);
 
-impl IndexedEventRelationKey {
-    /// Returns an identical key, but with the related event field updated to
-    /// the given related event. This is helpful when searching for all
-    /// events which are related to the given event.
-    pub fn with_related_event_id(
-        &self,
-        related_event_id: &EventId,
-        serializer: &IndexeddbSerializer,
-    ) -> Self {
-        let room_id = self.0.clone();
-        let related_event_id =
-            serializer.encode_key_as_string(keys::EVENTS_RELATION_RELATED_EVENTS, related_event_id);
-        let relation_type = self.2.clone();
-        Self(room_id, related_event_id, relation_type)
-    }
-}
-
 impl IndexedKey<Event> for IndexedEventRelationKey {
     const INDEX: Option<&'static str> = Some(keys::EVENTS_RELATION);